You eat pizza for lunch. Which step in the digestion process causes a chemical change in the pizza? Your teeth bite the pizza and take a small piece into your mouth. Your esophagus is a tube that moves the food from your mouth into your stomach. Your teeth grind the pizza to smash it. Your stomach mixes acid and enzymes with the food to break down protein in the pizza.
Added by Anthony A.
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Your teeth bite the pizza and take a small piece into your mouth: This is a physical change, not a chemical change. Show more…
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